Slot array-based beam-pointing two-dimensional controllable holographic antenna and control method thereof

Abstract

The invention provides a beam-pointing two-dimensional controllable holographic antenna and a control method thereof, and belongs to the technical field of holographic antennas. According to the holographic antenna disclosed by the invention, a novel holographic structure is constructed, namely, a regular slot array is arranged on a second metal plate, and a radio-frequency switch is arranged in the center of each array unit and is used for leaky wave radiation. By applying an FPGA control circuit and a direct-current bias network arranged on the upper surface of a second dielectric substrate,different direct-current bias voltages can be applied to the positive and negative electrodes of each radio-frequency switch so as to control the turn-on or turn-off of the radio-frequency switch. The holographic antenna has the advantages of being simple in structure and low in cost; any beam pointing can be easily realized; and scanning of wave beams on a pitch angle and an azimuth angle is realized, and a scanning range of + / -65 degrees can be reached.

Description

technical field [0001] The invention belongs to the technical field of holographic antennas, and in particular relates to a holographic antenna with two-dimensional controllable beam pointing and a control method thereof. Background technique [0002] The principle of holography comes from the field of optics. It refers to the technology of using some photosensitive materials to record the interference field formed by the interference of the reference wave and the target wave to obtain the interference surface, and then irradiating the interference surface with the reference wave to invert the target wave. The film of the traditional photography technology can only record the light intensity information, but the holographic technology can record the intensity and phase information of the object light at the same time, so it can realize the three-dimensional reproduction of the object image. [0003] The research on applying the holographic principle to the microwave band has...

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Problems solved by technology

However, the application scenarios of one-dimensional beam scanning are very limited, and it is impossible to achieve simultaneous deflection of azimuth and elevation angles

For two-dimensional beam scanning antennas, R. Guzmán-Quirós et al. proposed a FP resonant cavity antenna based on EBG structure in the literature (R.Guzmán-Quirós, A.R.Weily, etc, A Fabry–Pérot Antenna With Two -DimensionalElectronic Beam Scanning, IEEE transactions on antennas and propagation, 2016,64(4):1536-1541), but its disadvantage is that it can only realize beam scanning at several fixed azimuth angles, and can only achieve ±15° small area scan

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